Seiko Cal. 5664 - 447

This Spring Drive model from 1978 features a 37mm Hardlex-Coated Steel case. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-7e22fba36975]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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